engine breakin time?

[250rs-neva-die]

just got my 295r up and running this past weekend. i started it up and let it get hot then shut it down till it was cold again. did that three times then i took it for a lil put. got about 3 hours on it so far was just wondering how long people normally break a motor in for before they start running it hard. every bearing in the bottom end is new, center cases powdercoated gloss black, polished side case,new clutch,295 kit port and polished, vforce reeds, 38mm a/s carb fmf exhaust, new black plastics and seat cover, new lonestar +4" axle,10"itp c-series rims with 18" holeshots,have a +4" westcoast arm for it will get pics up when i get my camera back g/f dropped it. any feedback would be great thanks alot

68 indian moped
85r everyday rider
85 295r
86r rebuild in process
86r everyday rider
86 200x
89 lt500 .60 over ported exhaust
92 mustang lx
2000 foreman 4x4 lift kit tires winch
2005 ski-doo 600 renegade

[EastWest]

how much comp.? if the rings have seated good i would let her eat..

[gravelyman]

5 gallons is what ct racing says for a break in they have a spacific procedure for breaking in a new engine you can read it at thier web site or here


www.ctracing.com/cylinder.htm

[MTS]

3 hours is all it takes, make sure its jetted right, and warmed up properly, n giver the beans.

[ATC-Eric]

I let it warm up at idle a few times

then blip the throttle some on the third (about) warm up

Then take it around the yard slowly goin through the gears

then let it rip! Has proven good results everytime. (when I say let it rip I really let it rip!)

(Checking engine bolts between starts.)

Ive also been told it takes a good 5 hours to fully break in, and settle into its power.

[gravelyman]

I let it warm up at idle a few times

then blip the throttle some on the third (about) warm up

Then take it around the yard slowly goin through the gears

then let it rip! Has proven good results everytime. (when I say let it rip I really let it rip!)

(Checking engine bolts between starts.)

Ive also been told it takes a good 5 hours to fully break in, and settle into its power.
^^^^:crazy: :crazy: :crazy: ^^^^
Im glad your not doing the break in on my engine :lol: :lol: :lol:

[300rman]

^^^^:crazy: :crazy: :crazy: ^^^^
Im glad your not doing the break in on my engine :lol: :lol: :lol:

i did it the same way on my trike, no problems here.
my problems came later with the lean jetting D:

read this on break in procedure http://mototuneusa.com/break_in_secrets.htm

[gravelyman]

allen knowles at ct racing built my 350pv engine. with all the stuff i had him do to it it is only a 4g engine so if he says to break it in like this http://www.ctracing.com/pro-x.htm then thats how im going to break it in. anyone who knows allen should know his track record and the kind of engines he builds. besides i have been building engines for 13 years 8 of them at my own shop. not my house my own incorporated buisness www.mississippigravely.com and i would never take a new engine out let it warm up a while and then "let it rip" you need to heat cycle the piston. this is what hardens the piston . a new wisco piston has a rockwell hardness of 55 after you properly compleat the break in of a wiesco piston it has a hardness of 72. but hey this is just my 2 cents

[250rs-neva-die]

cool thanks gravelyman i did the heat cycle of the piston 4 times then putted around for a few then let it cool down. road her a lil the other day and she really wants to just start ripping. gonna put a few more hours on it before i started hammerin on her.

[300rman]

this is what hardens the piston . a new wisco piston has a rockwell hardness of 55 after you properly compleat the break in of a wiesco piston it has a hardness of 72. but hey this is just my 2 cents

i respectfully disagree, the conditions and heat levels inside a motor are not the kind of conditions that would "harden" a piston.

let it warm up, cool off, ride it a bit, after it isnt soming apart, start working the throttle a bit, and slowly work your way up to some hard runs, not exceeding about 3/4 throttle.
you dont want to rev the piss outta it, you want to lug the motor to put pressure on the rings and make them seal properly.


and just because you have always built motors and broke them in a certain way does not mean there isnt a better way to do it, and it certainly makes them no "break in expert"
If said engine builder has experimented with break-in-procedures (such as the guy in that article) and you have both specs on parts after tearing the motor back down, and dyno results of different break-in procedures, you are a more knowledgeable person in my opinion.
here are 23 other articles this guy has written, http://mototuneusa.com/thanx.htm

havent had a problem yet breaking in motors. you just have to make sure your not too lean on WFO blips.........